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Method for determining content of organic amine

An organic amine and content technology, applied in nitrogen determination, measuring device, chemical method analysis, etc., can solve the problems of cumbersome procedures and high investment cost, and achieve the effects of good repeatability, accurate measurement results, and repeatability and environmental protection.

Inactive Publication Date: 2017-03-29
ЦИНХАЙ СОЛТ ЛЕЙК ИНДАСТРИ ГРУП КО ЛТД
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for measuring the content of organic amines, which is used to solve the problem that the existing gas chromatography method for determining the content of organic amines is not only cumbersome, but also has a high investment cost.

Method used

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  • Method for determining content of organic amine

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Experimental program
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Effect test

Embodiment 1

[0045] Take a part from the sample to be tested as sample 1, use sample 1 to draw an ammonia standard curve on a spectrophotometer, and put sample 1 into the spectrophotometer to determine the content of total amine and inorganic ammonium.

[0046] Water was used as a blank test to correct the above measurement results.

[0047] Finally, the total amine content w in sample 1 was measured. 1 (calculated as nitrogen element) is 210.74ppm, inorganic ammonium content w 2 (calculated as nitrogen element) is 12.30ppm, organic amine content w 3 (calculated as nitrogen element) is 198.42ppm.

Embodiment 2

[0049] Take two samples from the sample to be tested as sample 2, numbered respectively as sample 21 and sample 22, wherein the mass of sample 21 is m 1 is 2.5580g, the mass of sample 22 m 2 It is 2.6126g.

[0050] Step 1: Determination of the content of inorganic ammonium in sample 2

[0051] (a) Sample 21 is placed in a distillation bottle, and 100 ml of ammonium-free distilled water is added to the distillation bottle. After mixing evenly, a distillation device is set up, and the content of inorganic ammonium in sample 21 is determined by distillation titration. 2 .

[0052] The distillation titration method for the determination of inorganic ammonium content refers to a method for the determination of ammonium in drinking water and wastewater. The ammonia is absorbed by the boric acid solution in the receiving bottle, and the ammonium in the distillate is titrated with the acid standard solution using methyl red-methylene blue as the indicator to measure the inorganic a...

Embodiment 3

[0087] Take two samples from the sample to be tested as sample three, namely sample three one and sample three two, wherein the mass of sample three one is m 1 is 2.4346g, the mass of sample 22 m 2 It is 2.6241g.

[0088] Step 1: Determination of the content of inorganic ammonium in sample 3

[0089] (a) Sample Sany is placed in a retort, 100ml of ammonium-free distilled water is added to the retort, after mixing evenly, a distillation device as in Example 2 is set up, and the content of inorganic ammonium in the sample Sany is determined by distillation titration w 2 .

[0090] (b) Add 5ml of boric acid solution in advance in the receiver of the distillation device, the mass fraction of the boric acid solution is 2%.

[0091] (c) Add dropwise sodium hydroxide solution to the solution in the distillation bottle, add dropwise a total of 20% sodium hydroxide solution with a mass fraction of 2ml, and the formed pH of the liquid to be distilled is 6.5. Distillation operation ...

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Abstract

The invention discloses a method for determining the content of organic amine. The method comprises the following steps: step 1: determining content w2 of inorganic amine in a sample to be detected by adopting a distillation titration method; step 2: determining content w1 of total amine in the sample to be detected by adopting a Kjeldahl method; and step 3: calculating the content of the organic amine in the sample to be detected, wherein content w3 of the organic amine in the sample to be detected is equal to (w1-w2), and sequences of the step 1 and the step 2 can be exchanged or the step 1 and the step 2 can be carried out simultaneously. Compared with a traditional gas chromatography for determining the content of the organic amine, the method for determining the content of the organic amine has the advantages of relatively low cost and relatively simple operation. Meanwhile, the method also has the advantages of relatively high precision, accurate determination result, good repeatability, environment friendliness and the like, and can be applied to conventional analysis and quality control of the content of the organic amine.

Description

technical field [0001] The invention relates to the technical field of determining the content of organic amines, in particular to a method for determining the content of organic amines. Background technique [0002] In the process of industrial production of chlor-alkali, the amount of potassium chloride brine is very large, but potassium chloride brine usually contains a certain amount of ammonia. Among them, organic amines refer to organic substances produced by chemical reactions with ammonia, including fatty amines There are seven categories of amines, alcohol amines, amides, alicyclic amines, aromatic amines, naphthalene amines and other amines. If the potassium chloride brine containing organic amines is used in the electrolysis process, nitrogen trichloride will be directly produced. The nature of nitrogen trichloride is very unstable, and explosion accidents will occur, which brings great hidden dangers to safe production. . Therefore, based on the above reasons, ...

Claims

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Application Information

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IPC IPC(8): G01N31/00G01N31/16G01N31/10
CPCG01N31/002G01N31/10G01N31/16
Inventor 屈小荣吴泽培牛莉慧马占梅李辉林
Owner ЦИНХАЙ СОЛТ ЛЕЙК ИНДАСТРИ ГРУП КО ЛТД
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